88 seems kind of cool for a warm side. Low 90's is what I run the inside of the warm hide at. Sunny1 has the right idea but maybe a bit conservative. 94 will not burn your snake. Consider that the average human body temperature is 98.2 and the range considered healthy is 97.8 - 99.1. I dont' think you could even come close to burning your snake with your body - even if you stuffed him in your armpit.

Its important to note that I'm talking about "contact burns" that could injure your snake's skin. Your snake could develop health problems if he was subjected to ambient temperatures in the high 90's long term.

Anyhoo... My setups all have two UTH's and a heat lamp on one side. On one setup, the heating pads are both large and identical so the heat lamp creates the "warm" side. On the other setup, I have a large UTH on one side and a small UTH on the other. In that case, the warm side is over the large UTH and I use a low-wattage heat lamp and the small UTH to create the cool side. So, utimately, you kind of have to rearrange things so they work with your setup.

So, how is your guy doing? Has he tried his hides yet?